MakeItFrom.com
Menu (ESC)

AZ91A Magnesium vs. Nickel 685

AZ91A magnesium belongs to the magnesium alloys classification, while nickel 685 belongs to the nickel alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is AZ91A magnesium and the bottom bar is nickel 685.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
350
Elastic (Young's, Tensile) Modulus, GPa 46
200
Elongation at Break, % 5.0
17
Fatigue Strength, MPa 99
470
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
77
Shear Strength, MPa 140
770
Tensile Strength: Ultimate (UTS), MPa 240
1250
Tensile Strength: Yield (Proof), MPa 160
850

Thermal Properties

Latent Heat of Fusion, J/g 360
320
Maximum Temperature: Mechanical, °C 130
1000
Melting Completion (Liquidus), °C 600
1380
Melting Onset (Solidus), °C 470
1330
Specific Heat Capacity, J/kg-K 990
460
Thermal Conductivity, W/m-K 73
13
Thermal Expansion, µm/m-K 26
12

Otherwise Unclassified Properties

Base Metal Price, % relative 12
75
Density, g/cm3 1.7
8.4
Embodied Carbon, kg CO2/kg material 22
10
Embodied Energy, MJ/kg 160
140
Embodied Water, L/kg 990
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
190
Resilience: Unit (Modulus of Resilience), kJ/m3 280
1820
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
23
Strength to Weight: Axial, points 38
42
Strength to Weight: Bending, points 49
31
Thermal Diffusivity, mm2/s 42
3.3
Thermal Shock Resistance, points 14
37

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
1.2 to 1.6
Boron (B), % 0
0.0030 to 0.010
Carbon (C), % 0
0.030 to 0.1
Chromium (Cr), % 0
18 to 21
Cobalt (Co), % 0
12 to 15
Copper (Cu), % 0 to 0.1
0 to 0.5
Iron (Fe), % 0
0 to 2.0
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
3.5 to 5.0
Nickel (Ni), % 0 to 0.030
49.6 to 62.5
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0
2.8 to 3.3
Zinc (Zn), % 0.35 to 1.0
0.020 to 0.12